Study on Soil Mobility of Two Neonicotinoid Insecticides

Table 3

Residues of CLO and TMX in soil columns. Residues of neonicotinoids absorbed on the soil and pumice columns. Residual levels were separately determined in the upper and lower half segments of the columns after preparation of samples by QuEChERS method.

Conc. in extract; g/mL	Clay soil samples		Loam soil samples		Sand soil samples		Pumice
	CLO	TMX	CLO	TMX	CLO	TMX	CLO	TMX
Upper half segment	0.089	~0.010	0.352	0.299	~0.010	<0.010	~0.010	<0.010
Lower half segment	~0.010	~0.010	0.289	0.270	0.0290	~0.010	~0.010	<0.010